A highly chemoselective Mukaiyama aldol reaction of saturated aldehyde over unsaturated aldehyde with enol tris(2,6-diphenylbenzyl)silyl ether
作者:Seiji Shirakawa、Keiji Maruoka
DOI:10.1016/s0040-4039(02)00036-9
日期:2002.2
An exceedingly high chemoselective Mukaiyama aldol reaction of saturated aldehydes in the presence of unsaturated aldehydes (benzaldehyde and α,β-enals) has been realized for the first time by using the structurally unique enol tris(2,6-diphenylbenzyl)silyl ether under the influence of BF3·OEt2 as a Lewis acid. Among unsaturated aldehydes, benzaldehyde is found to be more reactive than α,β-enals. The
在不饱和醛(苯甲醛和α,β-烯醛)存在下,饱和醛的极高化学选择性的Mukaiyama aldol反应已首次通过在结构上使用结构独特的烯醇三(2,6-二苯基苄基)甲硅烷基醚来实现。 BF 3 ·OEt 2作为路易斯酸的影响 在不饱和醛中,发现苯甲醛比α,β-烯醛更具反应性。烯醇三(2,6-二苯基苄基)甲硅烷基醚的结构独特性可以通过X射线晶体学以及1 H和13 C NMR光谱来观察。